If I'm not mistaken this is BR-PT......I believe PT-PT does not use the word "muda" with this meaning.

See:

http://michaelis.uol.com.br/moderno/ingles/index.php?lingua=...

seedling
seed.ling
n 1 planta cultivada a partir de sementes. 2 muda.



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Note added at 5 hrs (2013-05-02 23:23:44 GMT)
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BREEDING
All species of sugar cane are easily crossed. There are also reported crosses of sugar cane with, other genera, such as Zea and Sorghum, although none are of commercial value at the present (Wrigley 1982). Flowering cane is not desirable in commercial plantations because it indicates the end of vegetative growth and sugar production. Flowering can be avoided by extension of day-length by exposure of the cane to electric lights for short periods at night during the time when flowering usually occurs, therefore extending the productive life of the cane (McIlroy 1963). The greatest advance in sugar cane breeding came in 1888 when it was realized that sugar cane could set fertile seed which could be used to produce better cane varieties. Prior to this it was believed that all cane was sterile because one of the varieties of S. officinarum, Creole cane, which was the only variety known in the Western world for a long time, was sterile (Deerr 1949). The original breeding stations were in areas where cane flowers naturally, but are now found in many areas due to techniques such as manipulation of day length and temperature (Wrigley 1982). The pollen grain has a short viability, as does the seed. However, the flowers seldom set the 1 mm long seeds (McIlroy 1963). About 1 in 10,000 ***seedlings*** resulting from the thousands of crossings made annually is worth selection for trials, and less than 1 in 10 of these is likely to become a commercial variety (Wrigley 1982).